diff --git a/poetry.lock b/poetry.lock
index 7dd80d9..8c5e60f 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1880,13 +1880,13 @@ files = [
 
 [[package]]
 name = "ruamel-yaml"
-version = "0.17.40"
+version = "0.18.5"
 description = "ruamel.yaml is a YAML parser/emitter that supports roundtrip preservation of comments, seq/map flow style, and map key order"
 optional = false
-python-versions = ">=3"
+python-versions = ">=3.7"
 files = [
-    {file = "ruamel.yaml-0.17.40-py3-none-any.whl", hash = "sha256:b16b6c3816dff0a93dca12acf5e70afd089fa5acb80604afd1ffa8b465b7722c"},
-    {file = "ruamel.yaml-0.17.40.tar.gz", hash = "sha256:6024b986f06765d482b5b07e086cc4b4cd05dd22ddcbc758fa23d54873cf313d"},
+    {file = "ruamel.yaml-0.18.5-py3-none-any.whl", hash = "sha256:a013ac02f99a69cdd6277d9664689eb1acba07069f912823177c5eced21a6ada"},
+    {file = "ruamel.yaml-0.18.5.tar.gz", hash = "sha256:61917e3a35a569c1133a8f772e1226961bf5a1198bea7e23f06a0841dea1ab0e"},
 ]
 
 [package.dependencies]
@@ -2211,4 +2211,4 @@ cffi = ["cffi (>=1.11)"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.10"
-content-hash = "c81440866f5c1f33d3d706440d313ecbe8a31de503e5b4c85ff07dc18ed169c9"
+content-hash = "b09fb1b7d5da0db15c0bf37389afbb2ca9b53ffd5a9d04c587a8baaadaa185e5"
diff --git a/pyproject.toml b/pyproject.toml
index 705a34b..509086b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ license = "MIT"
 [tool.poetry.dependencies]
 python = "^3.10"
 mitmproxy = "^10.1.1"
-"ruamel.yaml" = "^0.17.32"
+"ruamel.yaml" = ">=0.17.32,<0.19.0"
 json-stream = "^2.3.2"